virtio: add low-level APIs for feature bits

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Add low level APIs to test/set/clear feature bits.
For use by transports, to make it easier to
write code independent of feature bit array format.

Note: APIs is prefixed with __ and has _bit suffix
to stress its low level nature.  It's for use by transports only:
drivers should use virtio_has_feature and never need to set/clear
features.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>

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This commit is contained in:

Michael S. Tsirkin 2014-11-27 21:19:02 +02:00

parent b2776bf714

commit d4024af56f

1 changed files with 50 additions and 3 deletions

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53

include/linux/virtio_config.h

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